January 11, Decorative Cushion Covers at the Ragfinery Making decorative cushion covers is easier than you think. This class offers you a chance to give your tired/boring cushion a face lift. Unleash your creativity by choosing different varieties of fabric to sew interesting and one-of-a -kind covers. The shapes of the cushion cover for this class are either square or rectangular. Common cushion cover sizes are 20?x20? or 14?x22?.